porting polylines with empty vector<Point> from 2.4 to master

2015-04-24 17:11:51 +03:00
parent 755527a90a
commit d2409d12c6
2 changed files with 22 additions and 0 deletions
--- a/modules/imgproc/src/drawing.cpp
+++ b/modules/imgproc/src/drawing.cpp
@@ -2229,7 +2229,10 @@ void cv::polylines(InputOutputArray _img, InputArrayOfArrays pts,
    {
        Mat p = pts.getMat(manyContours ? i : -1);
        if( p.total() == 0 )
+        {
+            npts[i] = 0;
            continue;
+        }
        CV_Assert(p.checkVector(2, CV_32S) >= 0);
        ptsptr[i] = p.ptr<Point>();
        npts[i] = p.rows*p.cols*p.channels()/2;